Watch John King's report on what Mitt Romney is doing and saying to win over evangelical voters in South Carolina.

(CNN) - In a CNN exclusive, Chief National Correspondent John King reports on a closed-door meeting that Republican presidential candidate Mitt Romney recently held with evangelical Christians in South Carolina.

(CNN) - In this video clip you can watch former New York City Mayor Rudy Giuliani, R-New York, discuss the corporate tax rate; Sen. Barack Obama, D-Illinois, discuss the Veterans Administration and taking care of injured Iraq war veterans; and Sen. John McCain discuss torture and waterboarding.

Watch this edition of the Race to '08 highlights from the campaign trail.

DES MOINES, Iowa (CNN) – Democratic presidential candidate John Edwards said Friday that he differs from Sen. Hillary Clinton significantly more than his other rival for his party’s nomination, Sen. Barack Obama.

"The differences between Sen. Clinton and myself are much more dramatic than the differences between Sen. Obama and myself,” the former North Carolina senator said at a news conference.

Edwards cited the issues of Iraq, Iran, and corruption in Washington as the key areas in which there are "really big differences" between Clinton and himself.

"Sen. Obama ... is not taking lobbyist money in this campaign," Edwards continued. "I think also on some of the substantive issues we're closer than I am with Sen. Clinton."

Edwards did admit that there were still some differences between Obama and himself. While acknowledging that they both came out with "specific" healthcare plans, Edwards says Obama's was released later than his proposal. Edwards also added that Obama's plan is not universal and "would leave as many as 15 million people uncovered."

The audio recording provides a rare glimpse into Romney's private efforts to win over evangelical Christians skeptical of his Mormon faith.

COLUMBIA, South Carolina (CNN) – At an invitation-only meeting held Tuesday with students, faculty and alumni of the fundamentalist Bob Jones University, former Massachusetts Gov. Mitt Romney put aside questions about his Mormon faith and focused instead on what he described as his shared values with Christians, according to an audio recording of the meeting obtained by CNN.

Although Romney has often spoken publicly about his efforts to allay the fears of evangelical Christians over his Mormon faith, the audio recording of the event provides a rare glimpse into Romney's private efforts to court the constituency many see as crucial to his presidential bid.

"I get good support from evangelical Christian leadership around the country, you know, despite a difference in religion," Romney told the audience of evangelicals gathered at the Greenville Hilton.

"I think it was Dr. Richard Land of the Southern Baptist Convention who said we're not electing a pastor-in-chief, and so I appreciate that support and just you remember that when you go to vote," he said with a laugh.

The recording, which was done without the knowledge of the Romney campaign or those from the Bob Jones community in attendance, was provided to CNN by an alumnus of the fundamentalist Christian school who was invited to the private meeting, which was described in an e-mail he also provided as "designed to specifically reach out to members of the Bob Jones University family."

WASHINGTON (CNN) – The decision of Rep. Jim Saxton, R-New Jersey, to retire at the end of the 110th Congress will mean that House Republicans will have at least 15 open seats to defend in 2008, compared to at least three for the Democrats.

Of the 15 House Republicans who will not run for re-election next year, 11 are retiring from elective politics entirely, while four are seeking higher office. On the Democratic side, two House members are running for Senate seats, while one has announced plans to retire at the end of this term.

CONCORD, New Hampshire (CNN) – Aboard his "Straight Talk Express," Arizona Sen. John McCain and former Homeland Security Secretary Tom Ridge questioned former New York Mayor Rudy Giuliani's judgment and experience by pointing to his association with former police commissioner Bernard Kerik who was indicted Friday and may face federal criminal charges.

McCain told reporters he had never approved of Kerik as a candidate for head of the DHS.

"I went to Baghdad shortly after the initial victory and met in Baghdad with Bremer, Sanchez and Kerik was there,” McCain said referencing former L. Paul Bremmer and Lt. Gen. Ricardo Sanchez. “Kerik was supposed to be there to help train the police force. He stayed two months and one day just left.”

"That's why I never would have supported him to be the head of Homeland Security because of his irresponsible act when he was over there in Baghdad to try to help train the police."

McCain blamed the initial failure of the police forces in Iraq saying Kerik "didn't do anything," and criticized his early departure.

Ridge added that Giuliani's judgment was "different than mine," on the decision of who to appoint Director of Homeland Security.